YSI 52 - Manual (Page 42)

General Specifications Appendix A
ower P
The Model 52 is powered by 6 alkaline D-cells batteries, or an AC adapter (optional).
Batteries power the instrument for approximately 100 hours.
Size and Weight
21.6 by 28 by 9.5 cm; 2.4 kg
8.5 by 11 by 3.75 inches; 4.3 pounds
YSI, Incorporated Model 52 38